src/wx/closed_captions_dialog.cc

   1 /*
   2     Copyright (C) 2018 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "closed_captions_dialog.h"
  22 #include "lib/string_text.h"
  23 #include <boost/bind.hpp>
  24
  25 using std::list;
  26 using std::max;
  27 using std::cout;
  28 using std::make_pair;
  29 using boost::shared_ptr;
  30 using boost::weak_ptr;
  31
  32 ClosedCaptionsDialog::ClosedCaptionsDialog (wxWindow* parent)
  33         : wxDialog (parent, wxID_ANY, _("Closed captions"), wxDefaultPosition, wxDefaultSize,
  34 #ifdef DCPOMATIC_OSX
  35                 /* I can't get wxFRAME_FLOAT_ON_PARENT to work on OS X, and although wxSTAY_ON_TOP keeps
  36                    the window above all others (and not just our own) it's better than nothing for now.
  37                 */
  38                 wxDEFAULT_FRAME_STYLE | wxRESIZE_BORDER | wxFULL_REPAINT_ON_RESIZE | wxSTAY_ON_TOP
  39 #else
  40                 wxDEFAULT_FRAME_STYLE | wxRESIZE_BORDER | wxFULL_REPAINT_ON_RESIZE | wxFRAME_FLOAT_ON_PARENT
  41 #endif
  42                 )
  43
  44 {
  45         _lines.resize (CLOSED_CAPTION_LINES);
  46         Bind (wxEVT_PAINT, boost::bind (&ClosedCaptionsDialog::paint, this));
  47 }
  48
  49 void
  50 ClosedCaptionsDialog::paint ()
  51 {
  52         wxPaintDC dc (this);
  53         dc.SetBackground (*wxBLACK_BRUSH);
  54         dc.Clear ();
  55         dc.SetTextForeground (*wxWHITE);
  56
  57         /* Choose a font which fits vertically */
  58         int const line_height = max (8, dc.GetSize().GetHeight() / CLOSED_CAPTION_LINES);
  59         wxFont font (*wxNORMAL_FONT);
  60         font.SetPixelSize (wxSize (0, line_height * 0.8));
  61         dc.SetFont (font);
  62
  63         for (int i = 0; i < CLOSED_CAPTION_LINES; ++i) {
  64                 wxString const good = _lines[i].Left (CLOSED_CAPTION_LENGTH);
  65                 dc.DrawText (good, 8, line_height * i);
  66                 if (_lines[i].Length() > CLOSED_CAPTION_LENGTH) {
  67                         wxString const bad = _lines[i].Right (_lines[i].Length() - CLOSED_CAPTION_LENGTH);
  68                         wxSize size = dc.GetTextExtent (good);
  69                         dc.SetTextForeground (*wxRED);
  70                         dc.DrawText (bad, 8 + size.GetWidth(), line_height * i);
  71                         dc.SetTextForeground (*wxWHITE);
  72                 }
  73         }
  74 }
  75
  76 class ClosedCaptionSorter
  77 {
  78 public:
  79         bool operator() (StringText const & a, StringText const & b)
  80         {
  81                 return from_top(a) < from_top(b);
  82         }
  83
  84 private:
  85         float from_top (StringText const & c) const
  86         {
  87                 switch (c.v_align()) {
  88                 case dcp::VALIGN_TOP:
  89                         return c.v_position();
  90                 case dcp::VALIGN_CENTER:
  91                         return c.v_position() + 0.5;
  92                 case dcp::VALIGN_BOTTOM:
  93                         return 1.0 - c.v_position();
  94                 }
  95                 DCPOMATIC_ASSERT (false);
  96                 return 0;
  97         }
  98 };
  99
 100 void
 101 ClosedCaptionsDialog::update (DCPTime time)
 102 {
 103         shared_ptr<Player> player = _player.lock ();
 104         DCPOMATIC_ASSERT (player);
 105         list<StringText> to_show;
 106         BOOST_FOREACH (PlayerText i, player->closed_captions_for_frame(time)) {
 107                 BOOST_FOREACH (StringText j, i.text) {
 108                         to_show.push_back (j);
 109                 }
 110         }
 111
 112         for (int j = 0; j < CLOSED_CAPTION_LINES; ++j) {
 113                 _lines[j] = "";
 114         }
 115
 116         to_show.sort (ClosedCaptionSorter());
 117
 118         list<StringText>::const_iterator j = to_show.begin();
 119         int k = 0;
 120         while (j != to_show.end() && k < CLOSED_CAPTION_LINES) {
 121                 _lines[k] = j->text();
 122                 ++j;
 123                 ++k;
 124         }
 125
 126         Refresh ();
 127 }
 128
 129 void
 130 ClosedCaptionsDialog::clear ()
 131 {
 132         Refresh ();
 133 }
 134
 135 void
 136 ClosedCaptionsDialog::set_player (weak_ptr<Player> player)
 137 {
 138         _player = player;
 139 }